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WASHINGTON, DC - FEBRUARY 10: Federal Reserve Board Chairwoman, Janet Yellen listens to questions during a House Financial Services Committee hearing on Capitol Hill, February 10, 2016 in Washington, DC. Ms. Yellen is delivering the Federal Reserve's semi-annual Monetary Policy Report to the House Committee. (Photo by Mark Wilson/Getty Images)

WASHINGTON, DC - FEBRUARY 10:  Federal Reserve Board Chairwoman, Janet Yellen listens to questions during a House Financial Services Committee hearing on Capitol Hill, February 10, 2016 in Washington, DC. Ms. Yellen is delivering the Federal Reserve's semi-annual Monetary Policy Report to the House Committee.  (Photo by Mark Wilson/Getty Images)